atomic copy_from_user?
From: Albert Cahalan (albert_at_users.sf.net)
Date: 12/22/03
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To: linux-kernel mailing list <linux-kernel@vger.kernel.org> Date: 21 Dec 2003 19:48:20 -0500
Surely I'm not the only one wanting such a beast...?
>From some naughty place in the code where might_sleep
would trigger, I'd like to read from user memory.
I'll pretty much assume that mlockall() has been
called. Suppose that "current" is correct as well.
I'd just use a pointer directly, except that:
a. it isn't OK for the 4g/4g feature, s390, or sparc64
b. it causes the "sparse" type checker to complain
c. it will oops or worse if the user screwed up
If the page is swapped out, I want a failed copy.
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- Previous message: Karim Yaghmour: "Re: [PATCH] Updating real-time and nanokernel maintainersy"
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